Recently the spouse got a flat (valve broke at the rim) and drove on this tire on the highway for a couple of minutes (really not a long time). When I looked at it it seemed weaker to the touch at the white line than nearer to the tread or nearer to the bead. Canadian Tire 'warranteed' this tire by replacing the valve and rebalancing it. They don't sell this model anymore, so I guess they couldn't really warrantee anything. Is it dangerous as is? It definitely wasn't driven much distance.